130 



variegated. 0,80. Scotland, not common, Zetland, 

 plentiful. 



GENUS. PATELLA. 

 Univalve, not spiral, shield-shaped or retire-conic, 



imperforate t devoid of a marginal fissure, cavity 



simple ; apex recurved anteriorly. 



P. VULGATA. Lin. 1258. Lam. 28. Mont. p. 

 475. D.p. 1032. Dor. Cat. p. 58. t. 23. /. 1,2. 

 List.Ang.p. 195. List. t. 635. f. l.Knorr. 6. t. 

 27. / 8. SI. t. 48. /. 1. Extremely variable in form 

 being more or less depressed or conic, scutelliform, the 

 apex subcentral and obtuse, various shades of yellowish 

 sea-green, rough with crowded elevated striae and about 

 fourteen but slightly raised subangulated riblets fre- 

 quently marked by a difference of color and scarcely, 

 if at all projecting at the margin ; inside sometimes 

 appearing ladiated. 2i. Common Limpet. 



P. PECTINATA. Lin. 1259. Born. t. 18. /. 7. 

 Lam. 40. SI. t. 49. /. 5. P. INTORTA. Don. 1. 146. 

 Pen. 4. p. 143. t. 90. f. 148. Mont. Sup. p. 154. 

 F. p. 286. D. p. 1037. Oval, somewhat trans- 

 parent, yellowish brown, with crowded radiating riblets 

 armed with black imbricated scales ; apex much inclined, 

 prominent nearly marginal. I. Anglesea, Devon, 

 Frith of Forth, rare. 



